John ham



J. HAM.

BOILER FURNACE.

(No Model.)

WITNESSES:

ATTORNEYS R 0 T N w N T.

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" UNITED STATES I PA'IEN'I Grains...

JOHN HAM, OF NEW YORK, N. Y.

BOILER-FURNACE.

SPECIPICATIONforming part of Letters Patent No. 331,635, dated December1, 1885.

Application filed July 23, 1885. Serial No. 172,465.

To aZl whom it may concern:

Be it known that I, J oruv HAM, a citizen of the United States, residingat New York, in the county and State of New York, have invented newanduseful Improvements in Boiler- Furnaces, of which the following is aspecification.

This invention consists in the combination, with a boiler and a furnace,of air-pipes, airdistributers at the side of the furnace,in front of thebridge-wall, and connections between the air-pipes and theair-distributers.

By this invention thorough combustion and saving in fuel are attained.

This invention is illustrated in the accompanying drawings, in whichFigure l is a longitudinal vertical section of my device. Fig. 2 is asection in the plane a; as, Fig. 1.

Similar letters indicate corresponding parts.

In the drawings, the letter A designatesa boiler provided with tubes to.B is a grate. O is an ash-pit, and D is a bridge-wall. The boiler A isprovided with tubes a. Air-pipes E can be passed through some of thetubes at. One end of said air-pipes E can communicate with the open airor with any suitable supply of air; or air may be forced or introducedinto the tubes E in any suitable manner. The other end of each of theair pipes or tubes E connects by suitable connectionsas, for example, bypipes F and joints or elbows b cwith air-distributors G. Theaindistributers G can be formed by boxes or cases of sheet metal orother suitable material. The airdistributers G are placed on each sideof the furnace H. By placing the air-distributors G within the wallsurrounding the boiler A the air-distributers G are not liable to beinjured by the heat of the furnace, and they do not interfere with thedraft nor with the introduction of fuel into the furnace H. The fuel canbe introduced through the furnace door I, and access can be had to theash-pit by means of the door K. By providing the air-distributers G onthe sides facing the furnace with perforations or openings the aircoming to the distributers G from the airpipes E will be supplied to thefurnace H, and will secure a thorough consumption of the fuel in thefurnace.

A thorough consumption of the fuel in the (N0 model.)

furnace will secure heating of the boiler with a less amount of fuelthan when the fuel is but partly consumed, and saving of fuel iseffected.

I am aware that in the United States Letters Patent No. 80,265, datedJuly 28, 1868, is set forth a curve for discharging fine streams of airamong the products of combustion; but such curve is shown as being soplaced in the furnace as to interfere with the draft and with thepoking, cleaning, and tending of the furnace.

By placing my air-distributors at the side of the furnace H, I attainnot only asatisfactory introduction of air into the furnace, but theair-distributors G do not interfere with the draft, nor with theinspection and the tending of the furnace and fuel. As the distributersG are in front of the bridge-wall D, the air, on issuing from thedistributors G, is in the immediate presence of the combustion going onin the furnace H, and will thus secure a thorough combustion. The airpipes or tubes E, extending through the boiler, will become heated, sothat the air passing through the pipes E is heated when issuing from thedistributors G, and the furnace H is not cooled by the air from thedistributers G. As cooling of the furnace and of the products ofcombustion may retard the heating of the boiler A, it is well to avoidsuch cooling. By providing the distributors G with a large number ofsmall perforations the air issues from the distributers G in finestreams, thus securing a thorough action of the air upon the process ofcombustion.

Of course the air-pipes E, instead of passing through the tubes a, mayalso be heated by being placed in contact with or close to the interiorof the boiler A; but I prefer to have the pipes E pass through theboiler.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a boiler, A, and furnace H, of air-distributorsG, consisting of perforated boxes or cases located at the sides of thefurnace, in front of the bridgewall, air-pipes E, extended through theboiler, and connections between the air-pipes and air-distributors,substantially as described.

2. The combination, with a boiler, A, and

IOO

furnace H; of air-pipes E, extended through hand and seal iii thepresence of two sfibs'eribsaid boiler,- ir-distributers G, loeited atthe ing' witnesses, sides of the furnace, in front of the bridgewall,and pipes F, having elbows b c,f0r con- N 5 meeting said air pipes anddistributers, sub- WVitnesses:

stantially as deseribed. E. KASTENHUBER,

In testimony whereof I have hereunto set my A. FABER DU FAUR, J r.

